Dental casting machine



Dec. 27, 1921'. 1 1,653,911

S. L. JEFFERIES DEN TAL CASTING MACHINE Filed March 14. 1924 2 Sheets-Sheet l WITNESSES O A6 iiVENTOR 7 155 W Q 14 EFFFF i BY 0 ATTORNEYS Dec. 27, 1927. r 1,653,911

S. L. JEFFERIES DENTAL CASTING MACHINE Filed March 14. 1924 2 Sheets-Sfieot 2 A TTOR NE YS Patented Dec. 27, 1927.

' UNITED STATES 1,653,911 PATENT OF"FI*CE. 1

SAMUEL LIONEL JEFEERIES, or GAFFNEY, scorn CAROLINA.

DENTAL CASTING MACHINE.

Application filed March 14, 1924. Serial Nd. 699,323.

of the diversified operations involved in dental casting such as soldering, slowly heating the investment material, burning out the wax, soldering bridges, making small castings such as inlays, fillings, clasps or the like or making large castings such as cast plates,

bridges or the like.

A further object is to provide a machine having the foregoing enumerated advantages and capacities and which is also of simple and durable construction, reliable and ellicient and convenient in operation and easy and comparatively inexpensive to manufacture. i 1

Other objects and advantages of the invention reside in certain novel features of the construction, combination and arrangemcnt of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming part of this specification, and in which:

Figure 1 is a perspective view, showing one embodiment of the invention;

Figure 2 is plan view, showing another form of casting lid from that illustrated in Figure 1; l l 1? Figure 3 is a view in section on line 3-8 of Figure 2;

Figure 4 is a plan view of a third form of casting lid; 7

Figure 5 is a view in section on line 55 of Figure 4;

Figure 6 is a plan view of a fourth form of casting lid;

Figure 7 is a view in section on line 7-7 ofFigure 6 Figure 8 i casting lid;

Figure 9 is a view in section on line 9-9 of Figure 8; 1

Figure 10 isa view, partly in top plan and partly in horizontal section, showing a slightly different means for supporting the casting table on the standard;

Figure 11 is a view, partly in elevation and partly in vertical section, showing a slightly "modified form of standard;

s a plan view of afifth form of Figure 12 is a fragmentary view of the upper part of the standard shown'in Figure 11 and illustrating a different form of casting cup applied to said standard; and

Figure 13 is a view in horizontal section on line l3-13 of Figure 11. V

Referring to the drawings and more particularly to Figure 1, the numeral 1 designates a base. Astandard 2 upstands from the base, and has its lower end releasably secured thereto. A castingtable 3 is provided and is supported for vertical adjustment on the base'l and standard 2 by means i of vertical ad ustable legs l and an adjustable connection 5 on the standard 2. Each leg 4 includes a screw threaded rod 6secured at its upper end to the table 3 andhaving an internally threaded sleeve 7 engaged therewith. The lower end of each sleeve 7 is'fitted in a socket or seat 8 provided therefor in the base 1. The connection 5 includes a guide 9 integrally formed with the table 3 and slidably embracing the standard 2 and also includes a thumb screw 10 carried by the guide 9 and engageable with the standard 2. In Figure 1 theguide 9 is shown as of rectangular form and being integral withthe table. 8. In Figure 10 a slight variation of this struetureis shown and comprises a stud -11 mtegrallytormed with the table andadapted to be selectively inserted in any one of a series of openings 12 provided in the standard 2. The stud 11 is threaded, as at 13 and the threaded portion projects beyond the rear side of the standard 2 and has threaded thereon a nut 14 whereby the stud is held to thestandard. The casting tablesB are formed with acircular opening 15 with which any one of a set or series of casting lids'now to be described are cooperable. It is to be understood that the casting lids provide for a regulation and control oft'he degree and character of the heat appliedto the casting rings or cups as will hereinafter more tullyappear'.

In Figure 1 a casting lid .l6is shown fitted in the opening 15 in the table 3. This casting lid 16 is formed with a peripheral flange 1'? which fits on the portion of the table3 surrounding the opening 15 to support the lid 16in the opening. The body portion of the lid 16 is formed with a small seat 18 for the smallcasting rings and a large seat 19 tor the "larger casting rings, the seats 18 and 19 takingthe form of concentric depressions or recesses 'inthe lidf and the 25 gradual burning out of the was.

35 complete the seat 18 heingdeeper than the seat 19 and heing -centrzilly disposed. T The casting lid 16 is provided with a, plurality of openings :20 which extend entirely therethrougth and these openingsnre loclit'ed onthe' costing;

lid us to occur in the sent 18 aswell as in the sent 19. This plurality of holes admit the heat gradually from the lininedirectly underneath 'the mold. The lid 16 is also provided with socln-zts designed to cooperate with u lilter such 1l5-2111- ordinary stove llliitll', whereby the lid 16 may heiconreniently handled. This casting lid 16 i may he advantageously used in thein'itiel stages of the casting operation \vheniit desirable to gradually heat up the mold end drive oil the waiter contained in the investment ma terial thereby safeguarding against the formutionoi. steainflin theiinvestinent material and consequently ogainstithe danger of the steein lJlOWlllg out: theinvestmentmaterial. The useolithis lid 16 also prevents excessive expnnsi on and contraction of the mold material and provides for the slow and However after the mold has been slowly heated up without danger of excessive expansion! of mold material? and utter the writ contained in the investment material husheen driven 30 oil. without danger of the formation of flange 17 of the lid 16 end designedto sup-' port the casting lid 22in the opening 15 of the table llheicestnig lidllQ is formed \Yltll l esses ill and 25 deh1nng seats lor thevcastil'ie onpsyhut lhe perforations u re omitted so that :r soliifl rusting lid is oh-- trained. This eestinglid is designed for useiwhereiit is desirehle to keep the flin'no outoioontinttwvith the mold and where :1 i very moderate np 'ilication ol heat is desired,

mod it is rprovided with: sockets 526 60110 spending to the sockets 21 inthe lid 16. V lnFignres 4: and 51a casting lid, desig hated generally at 21, is provided and is or chides as in the othereinhodiments1e periphe'el: supporting flnngeJQSuend sockets it 29 for the lifter, Thehody: portioneofthe lid 27 iscutewayto provide five grid fingers 30 so theti thiscasting lid 27 provides for the application ofwflame direetlyito thehot- $0111 and sidesof the mold and consequently for the application of a high degree oi heat.

In -Figl1TeS i6 and i7 a casting lidpdesigor lower end ol nnted generally at 3i is provided and corresponds in all respects to the casting lid 27 exceptthat only four grid lingers are provided, these grid lingers being; designated 211132 niidthe bther end. of each grid linger isnotched ns :it 33, to provide seals for lugs 34; carried by ncusting ring 35. Thus the casting lid ll like the casting lids 1.113 and 22 is formed with o seat for the misting ring. 2 1 t In Figures and 9 a casting lid desies noted gene-nllv til} 36 is provided and is identical in all respects with the casting lids 27 end 31 exceptthiit six grid lingers, designated at 37 are provided end that the upper portions of the outer ends oi these lingers are cut away or recessed, as at 38, to provide it sent for the unnularllange 39 provided on it costing ring 40. v i i it y Obviously the casting lidsElT, 31 end loll are all adapted for use where it desired to apply it high degree of heart directly to thehottoni orlowerportion and sides oi? the casting ring or mold and these three (.flStiilgllltlS dill'er from each other only in theninnher of grid lingers provided and in the means employed for supporting the casting rings thereon. '.lhese lids 27, 2-H and 36 maybe conveniently employed completing the casting; operetioni By isnrn these lids and applying the llmne directly to the. bottom and sides of themold orrnsting ring carried thereby through the open ill) chilled oil but will flow into all. the margins corners; and undercuts and completely [ill the inoldcnvity to produce it perfect casting It is to heunderstood that the linse- 1 snpports the burnerbelow the casting lids and that the fleme it such burner is applied through thernstinn'lid to the lower portion 1 the resting 'rinn' and the mold carried therein The rusting lids are all interrliengenlile nod only he readily chungeil so thet t e ll times during the rust lug operation the di-rn'ree and clmrnrler oli' the,hentnpplied lo the lower portion otllm mold only he controlled and regulated Irv moons of these costing lids.

The upper end (it the standard Ellis hilnrcaledJto provide vertically arranged and s mced parallel arms 4!] hnvmg, series of ahnethpivot openings 42. An o 'iernting lever 43 is provided and is adopted; to he lulcrumed in any pair of alined o 'ienine's 4-2 by means of a pivot pin 44 selectively coopefable with the nlined openings 4-2 and.

extending of course through :1 pivot opening inthe lever e3. One end of the lever is termed to constitute :i hendle e5 mid the -oppositeend of thelever is eonnected ns lit l6, to :1V retriictile coil spring 47 thelowerend of which is connected, as at 48, to thefhase 1. Intermediate its ends the lever e3 carries it casting Weil d s nedrenews entit e Hill lllli llll) soft white paper, clay or other soft and pliable material and to utilize this material in coacting with the casting rings to force the gold into the mold cavity. In lieu of the cup 49, a cup designed for the use of con'ipressed air and somewhat similar to that shown in Figure 3 of Patent No. 1,464,657 may be employed, the two cups being adapted for use interchangeably. The spring' l-T is tensioned' to throw the lever to such position as to maintain the casting cup 49 elevated and spaced from the casting ring carried on the lid of the casting table.

In Figures 11 and 13 a slightly modified form of the invention is shown, and consists of a base above which a 'ast-ing table 51 is adjustably supported by means o'l adjustable legs 52 identical with the legs t of Figure 1 and an adjust-able connection, designated generally at 53, on a standard, designated generally at 54. e The standard 5% includes a cylinder having its lower end closed, as at 56, and threaded onto the base, as at 57. The upper end of the cylinder 55 open and a vertically adjustable member 58 is fitted into the cylinder through the opening in the upper end thereof. A. collar 59 is fixed to the lower end ot the member 58 and coacts with an annular cap nut 60 screwed onto the upper end of the cylinder 55 to prevent the member 58 from being entirely withdrawn from the cylinder 55. The member 58 is however vertically adjustable in the cylinder 557 A compression coil spring 61 is interposed between the lowerend of the member 58 and the closed end 56 of the cylinder 55 and tends to elevate the member 58. The connection 53 includes a guide 62 which has a sliding fit on the cylinder 55 and is held in adjusted position thereon by means of a set screw 63 carried by the guide and engageable with the cylinder 55. A casting cup is provided and is mounted on the member 58 by means of an arm 65 having threaded connection, as at 66 with the memher 58. A handle 67 is fixed to the upperend of the member 58. In lieu of the handle 67 a hnoh formed upon or connected to the upper end of the member 58 may be employed. It is to be understood that the casting table 51 has an opening into which any one of the casting lids 16, 22, 27, 81, 36 or may be interehangebly fitted and these lids carry the casting rings. carries moldine, soft white paper, clay or other soft pliable material and when the handle 67 is pressed dowi'iwardly the member moves downwardly into the cylinder 55 and the cup 64: is brought down onto the ringand mold to force the gold into the mold cavity.

In lieu of using a casting cup such as shown in Figure 11 the arrangement shown in Figure 12 may be employed and the moldine or the like replaced in its action by compressed air. In Figure 12 the numeral 68 designates a casting cup which is mounted on the member 58 by an arm 69 having threaded connection with the member 58. It will be understood that the cups64: and 68 are interchangeble. An air supply pipe 70 is carried by the cup 68 and extends through the arms 69 and projects beyond the same in order that it may be conveniently coupled to an air supply pipe 71 leading to any source of supply of compressed air.

' I claim:

1. In a dental casting maehine,a casting lid having a recess providing a seat and adapted to receive a casting ring, said lid having grid fingers, and a casting ring having a flange engageable with said fingers.

2. In a dental casting machine, a casting lid having a recess providing a seat and adapted to receive a casting ring, said lid having grid fingers, the outer ends of the SAMUEL LIONEL JEFFERIES.

The cup 64 

